These products were created for engines smaller than 6.7 liters that are fully computerized. Works for some of the vehicles created from 1982 and all after 1996 check with the manufacturer on whether your vehicle qualifies as a computerized engine prior to 1996. The purpose of the DYNAMIC NOISE ATTENUATOR is to eliminate most of the noise that affects the efficiency of the engine. Which causes premature deterioration of sensors and devices that are electronically controlled. By installing the DNA COIL as instructed on the QR CODE on the package you will gain fuel economy and lower the maintenance costs associated with premature sensor deterioration.